The wetability of a surface by a liquid depends primarily on
Options
(a) surface tension (b) density (c) angle of contact between the surface and the liquid (d) viscosity
Correct Answer:
angle of contact […]
The pressure at the bottom of a tank containing a liquid does not depend on
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(a) Acceleration due to gravity (b) Height of liquid column (c) Area of bottom surface (d) Nature of […]
A body, which emits radiations of all possible wavelengths, is known as
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(a) Good conductor (b) Partial radiator (c) Absorber of photons (d) Perfect black body
Correct Answer:
Perfect black body
Explanation:
No […]
Cohesive force is experienced between
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(a) Magnetic substances (b) Dissimilar molecules (c) Molecules of same substance (d) None of these
Correct Answer:
Molecules of same substance
Explanation:
No explanation available. Be the first […]
If capillary experiment is performed in vaccum, then a liquid under the condition
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(a) will raise (b) will remain as such (c) will fall (d) None of these
Correct Answer:
will raise
Explanation: […]
A slab consists of two parallel layers of two different materials of same thickness and area having thermal conductivities K₁ and K₂. The equivalent conductivity of the combination of
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(a) K₁ + K₂ […]
The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?
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(a) length = 100 cm, diameter = 1 mm […]
Water rises to a height h in capillary tube. If the length of capillary tube above the surface of water is made less than h, then
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(a) water rises upto a point […]
The young’s modulus of steel is twice that of brass. Two wires of same length and of same area of cross section, one of steel and another of brass are suspended from the same roof. […]
The value of coefficient of volume expansion of glycerin is 5 x 10⁻⁴ k⁻¹. The fractional change in the density of glycerin for a rise of 40⁰ C in its temperature, is
Options
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